JP4612483B2 - Method for manufacturing aluminum alloy-titanium grooved composite plate - Google Patents

Method for manufacturing aluminum alloy-titanium grooved composite plate Download PDF

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JP4612483B2
JP4612483B2 JP2005179023A JP2005179023A JP4612483B2 JP 4612483 B2 JP4612483 B2 JP 4612483B2 JP 2005179023 A JP2005179023 A JP 2005179023A JP 2005179023 A JP2005179023 A JP 2005179023A JP 4612483 B2 JP4612483 B2 JP 4612483B2
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JP2006346730A (en
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耕太郎 横田
義和 鈴木
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古河スカイ株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/50Fuel cells
    • Y02E60/52Fuel cells characterised by type or design
    • Y02E60/521Proton Exchange Membrane Fuel Cells [PEMFC]

Description

  The present invention relates to a method for producing an aluminum alloy-titanium grooved composite plate in which one or both surfaces of an aluminum alloy plate are coated with a titanium layer and a groove shape is imparted to the plate surface, and in particular, a separator for a polymer electrolyte fuel cell, The present invention relates to a method for manufacturing a grooved composite plate suitable for other various heat exchanger parts and building materials.

  As is well known, a polymer electrolyte fuel cell forms an assembly by sandwiching an ion exchange membrane between two electrodes, a fuel electrode (anode electrode) and an air electrode (cathode electrode), and further, both sides of the assembly. A structure in which a conductor called a separator is pressed against each other is used as a unit electrode, and a large number of unit electrodes are stacked in series. In such a fuel cell, the separator not only functions to electrically connect adjacent unit electrodes, but also serves as a passage for supplying hydrogen and air, in order to secure the passage. Usually, it has a shape in which a plurality of parallel grooves are formed on one side or both sides.

  The fuel cell separator material as described above is not only required to have high conductivity, but also has excellent moldability and excellent corrosion resistance from the need to impart a groove shape. In addition, high productivity and low cost, light weight, and high mechanical strength are also desired.

  By the way, as a conductive material, there is an aluminum alloy as a material having excellent moldability and light weight and relatively low cost. However, the corrosion resistance of the aluminum alloy is not so high, and therefore the aluminum alloy alone is not suitable as a separator for the fuel cell as described above. On the other hand, as a conductive material, titanium is a material having excellent corrosion resistance that is resistant to corrosion even under harsh environments and having good lightness. However, because titanium is not always good in formability and the material unit price is high, it is expensive as a part with a groove-like shape, and its use is limited, and it is not always suitable as a fuel cell separator. It wasn't.

  By the way, if an aluminum alloy-titanium composite plate in which an aluminum alloy is used as a base material and a titanium layer is formed on the surface, in particular, the surface on which corrosion resistance is required, the formability is compensated by compensating for the disadvantages of the aluminum alloy and titanium. It is considered that it can be used as a member that is excellent in corrosion resistance and at a relatively low cost, and also has lightness and mechanical strength, and is also suitable for a fuel cell separator. It is done.

  Various methods for producing such aluminum alloy / titanium composite plates have been conventionally known. Typical examples of such methods include explosive pressure bonding as shown in Patent Document 1. is there. Moreover, as shown in Patent Document 2 and Patent Document 3, a method of manufacturing an aluminum alloy-titanium composite plate by rolling is also known. Further, a fuel cell separator made of a composite plate (clad material) such as aluminum and titanium has been proposed in Patent Document 4. In this proposal, as a specific manufacturing method of the separator, titanium is applied to the surface of aluminum by rolling or extrusion. Alternatively, when a clad material coated with a titanium alloy is formed and the clad material is further plastically processed into a separator shape, the surface of the clad material is coated with copper and then the surface copper is removed, and then carbon or the like A method of coating the material is shown.

  In addition, as a method for manufacturing a molded product made of a container-shaped dissimilar metal clad material, Patent Document 5 discloses that different metal materials are overlapped for deep drawing to simplify the process. A method of simultaneously performing metal joining (cladding) and forming has also been proposed.

JP-A-7-185840 Japanese Patent Publication No. 3-43950 JP-A-8-90257 JP 2002-358974 A JP 2003-145225 A

  The methods proposed in Patent Documents 1 to 5 as described above have various problems, and are practical for an aluminum alloy-titanium composite plate having a groove shape for use in a fuel cell separator or the like. There are problems in terms of productivity, cost, moldability, and the like when applied to manufacturing on a mass production scale.

  For example, by applying a method of manufacturing a composite plate by explosive pressure bonding as shown in Patent Document 1 and a method of manufacturing a composite plate by rolling as shown in Patent Document 2 and Patent Document 3, When manufacturing a plate-shaped part having a non-grooved shape, it requires two steps: a step of joining (cladding) dissimilar metal plates to obtain a composite plate, and then a forming process for imparting a groove shape. Not only is the process complicated and the productivity is low, but the cost is also high. In addition, since the formability (deformability) is significantly different between aluminum alloy and titanium, there is also a problem in that the forming process after cladding cannot be performed reliably and stably.

  Also, when manufacturing a grooved separator for a fuel cell by the method disclosed in Patent Document 4, after forming a clad material, the surface is coated with copper and then molded, and then the copper is removed. There is a fatal drawback that a large number of processes are required, the number of processes is reduced, productivity is lowered, and cost is inevitably increased.

  Further, in the case of the method shown in Patent Document 5, since the cladding process and the forming process are performed simultaneously, the process is simplified, but the applied forming process is limited to the deep drawing process. However, it is not suitable for manufacturing a fuel cell separator having a complicated shape, particularly a grooved shape.

  The present invention has been made against the background described above, and is suitable for manufacturing an aluminum alloy-titanium composite plate having a groove shape such as a separator for a fuel cell, and has a simple process, high productivity, and cost reduction. An object of the present invention is to provide a method of manufacturing a composite plate that can achieve the above.

  In order to improve the productivity and reduce the cost by simplifying the process of manufacturing the aluminum alloy-titanium composite plate having the groove shape, the bonding (cladding) of aluminum alloy and titanium and the provision of the groove shape are made single. It is conceivable to carry out at the same time in the process. However, the deformation resistance differs greatly between aluminum alloy and titanium, and therefore it has been conventionally considered difficult to simultaneously perform bonding and groove formation in one step. However, as a result of repeated experiments and examinations by the present inventors, the surface roughness of the joint surface between the aluminum alloy and the titanium to be joined by applying warm compression molding (warm press molding) under an appropriate temperature condition. By adjusting the degree appropriately, it has been found that joining titanium and aluminum alloy and imparting a groove shape can be performed simultaneously in one step, and the present invention has been made.

  Specifically, the manufacturing method of the aluminum alloy-titanium grooved composite plate according to the first aspect of the present invention provides a laminate by disposing a titanium plate on one or both sides of an aluminum alloy plate, and the titanium plate in the aluminum alloy plate. The surface in contact with the aluminum plate is adjusted in advance so that the surface roughness Ra is in the range of 0.1 to 4.0 μm, and the surface in contact with the aluminum alloy plate in the titanium plate is the surface thereof. The roughness Ra is adjusted in advance so as to be in the range of 0.1 to 6.0 μm, and the laminated body is 250 to 450 ° C. by a mold having protrusions corresponding to the groove shape to be formed. This is characterized in that the compression molding is performed at a temperature within the above range, thereby joining the aluminum alloy plate and the titanium plate and imparting the groove shape at the same time.

  A method for producing an aluminum alloy-titanium grooved composite plate according to a second aspect of the present invention is the method for producing an aluminum alloy-titanium grooved composite plate according to claim 1, wherein the aluminum alloy plate is a high-temperature tensile at 350 ° C. A material having a strength of 30 MPa or more and a high-temperature yield stress of 20 MPa or more is used.

  Furthermore, the manufacturing method of the aluminum alloy-titanium grooved composite plate according to the invention of claim 3 is the method for manufacturing the aluminum alloy-titanium grooved composite plate according to claim 1, wherein the aluminum alloy plate has Mg0.6-6. It is characterized by using an aluminum alloy containing 0.0%.

  According to the method for producing an aluminum alloy-titanium grooved composite plate of the present invention, when the aluminum alloy plate and the titanium plate are laminated and warm compression molded (warm press molding), The aluminum alloy has a groove shape suitable for a separator of a polymer electrolyte fuel cell and the like, without causing joint failure or molding failure, by appropriately adjusting the degree of temperature and appropriately regulating the compression molding temperature. -Titanium composite plates can be easily manufactured in a single process, which can dramatically improve the productivity in manufacturing grooved composite plates for this type of application, and at a much lower cost than before. Can be reduced.

  In the method of the present invention, basically, a titanium plate is arranged on one or both sides of an aluminum alloy plate to form a laminate, and the aluminum alloy plate-titanium plate laminate is formed into a protrusion corresponding to the groove shape to be formed. It compresses (press-molds) with the metal mold | die which has and joins an aluminum alloy plate and a titanium plate, and provides a groove shape simultaneously. In the case of the method of the present invention, the surface roughness Ra of the surface in contact with the titanium plate in the aluminum alloy plate is within the range of 0.1 to 4.0 μm, and the surface roughness of the surface in contact with the aluminum alloy plate in the titanium plate. The surface roughness Ra is adjusted in the range of 0.1 to 6.0 μm, respectively, and the temperature at the time of compression molding (press molding) of the laminated body by the mold having the protrusions is set to 250 to 450 in particular. It is important to set the temperature within the range of ° C., that is, the so-called warm forming temperature range. As described above, the surface roughness of each plate is adjusted within a specific range, and the temperature during compression molding is set to a warm molding temperature range within a specific temperature range, thereby causing molding defects and bonding defects. Therefore, it was possible to obtain a composite plate having a groove shape.

  The reasons for limiting these conditions will be described below.

  Surface roughness Ra of the surface in contact with the titanium plate in the aluminum alloy plate (hereinafter simply referred to as “surface roughness Ra of the aluminum alloy plate”) and surface roughness Ra of the surface in contact with the aluminum alloy plate in the titanium plate (Hereinafter simply referred to as “surface roughness Ra of the titanium plate”) improves the bondability between the aluminum alloy plate and the titanium plate by warm forming (compression) and improves the formability of the groove shape imparting. Therefore, stable bondability and groove shape imparting formability can be obtained for the first time by adjusting the surface roughness Ra within an appropriate range. That is, in the aluminum alloy containing Mg, which is the main object of the present invention, an oxide film mainly composed of MgO is likely to occur during warm forming, and this tends to cause poor bonding. By having an appropriate roughness on the surface of the aluminum alloy plate, it causes plastic flow on the surface of the aluminum alloy plate during warm compression, destroying the oxide film, obtaining sufficient bondability, and deforming more than the aluminum alloy plate It is possible to smoothly form a titanium plate having poor performance into a groove shape by following the deformation of the aluminum alloy plate by meshing the unevenness of the joint surface.

  Here, when the surface roughness Ra of the aluminum alloy plate is less than 0.1 μm, the bonding with the titanium plate is hindered by the warm oxide film (mainly MgO), and a portion where bonding is insufficient is likely to occur. Become. On the other hand, if the surface roughness Ra of the aluminum alloy plate is so rough that it exceeds 4.0 μm, the unevenness on the surface of the soft aluminum alloy plate is only crushed by compression, and the bondability is not improved any more. Therefore, the surface roughness Ra of the aluminum alloy plate needs to be adjusted within the range of 0.1 to 4.0 μm.

  On the other hand, when the surface roughness Ra of the titanium plate is less than 0.1 μm, the plastic flow on the surface of the aluminum alloy plate in contact with the titanium plate cannot be sufficiently caused, resulting in insufficient bonding. On the other hand, if the surface roughness Ra of the titanium plate exceeds 6.0 μm, the titanium does not catch up with the deformation of the aluminum alloy plate during forming to be elongated into a groove shape, and tearing occurs, resulting in defective forming. Therefore, it is necessary to adjust the surface roughness Ra of the titanium plate within a range of 0.1 to 6.0 μm.

  In addition, the specific means for adjusting the surface roughness of the aluminum alloy plate and the titanium plate is not particularly limited as described above, and even if rolling with a blast roll or an embossing roll is used, the unevenness of the roll is not limited. May be transferred to the surface of the rolled plate.

  When the laminate of the aluminum alloy plate and the titanium plate imparted with an appropriate surface roughness as described above is compression-molded with a mold having a groove shape, the compression molding temperature is set within a range of 250 to 450 ° C. There is a need.

  When the compression molding temperature is lower than 250 ° C., the deformability of titanium and the aluminum alloy is insufficient, so that the deformation of titanium does not catch up with the deformation of the aluminum alloy, and tearing easily occurs. On the other hand, if the compression molding temperature exceeds 450 ° C., poor bonding is likely to occur due to surface oxidation of titanium and aluminum alloy, and MgO oxide film is likely to occur particularly in the aluminum alloy containing Mg, which is the main object of the present invention. This is liable to cause poor bonding. Therefore, in order to obtain good bondability and moldability, the compression molding temperature needs to be in the range of 250 to 450 ° C.

  When an unannealed workpiece is used as the aluminum alloy, the compression molding temperature is preferably a temperature range equal to or higher than the recrystallization temperature of the aluminum alloy, and it is desirable to cause recrystallization at the initial stage of compression molding or preheating before compression molding, Usually, it is preferably within a temperature range of 350 ° C. or higher (450 ° C. or lower).

  Here, in order to obtain better bondability and formability more reliably and stably, not only the compression molding temperature is regulated within the range of 250 to 450 ° C. as described above, but also as an aluminum alloy plate. As specified in Item 2, it is desirable to use a material having a high-temperature tensile strength at 350 ° C. of 30 MPa or more and a high-temperature yield stress at 350 ° C. of 20 MPa or more.

  In other words, the strength and strength of the aluminum alloy sheet greatly affect the bondability and formability by warm compression molding. With a material having a low high-temperature strength, for example, a soft aluminum material such as pure aluminum, At the time of compression molding, titanium does not catch up with the deformation of aluminum, and only aluminum is stretched, making stable joining and molding difficult. According to the experiments by the present inventors, if an aluminum alloy plate having a high temperature tensile strength at 350 ° C. of 30 MPa or higher and a yield stress at 350 ° C. of 20 MPa or higher is used, the material at the time of compression molding The present inventors have found that the above-described problems can be avoided by improving the balance of deformation between them, and these conditions are defined in claim 2.

  In the method of the present invention, the type and composition of the aluminum alloy plate are basically not particularly limited, but usually Mg as an essential alloy element is 0.6 to 6 as defined in claim 3. It is desirable to use an aluminum alloy containing 0.0%.

  In other words, the addition of Mg to aluminum has the effect of suppressing the concentration of local deformation during compression molding by uniformly dispersing and depositing precipitates, so that the aluminum alloy becomes non-uniform during compression molding of the laminate. It is possible to prevent a situation in which titanium that is deformed and peels off or breaks in contact with the titanium. Therefore, the addition of Mg has an effect of enabling the formation of a stable grooved shape. Here, when the amount of Mg in the aluminum alloy is less than 0.6%, there are few precipitates that contribute to the homogenization of the deformability, so that the above-mentioned effects can hardly be obtained, while over 6.0% Inclusion of a large amount of Mg makes it difficult to manufacture the material. Therefore, in order to obtain a stable and good formability when the laminate is compression-molded into a grooved shape, it is appropriate to use an aluminum alloy containing 0.6 to 6.0% Mg.

  Here, elements other than Mg in the aluminum alloy containing 0.6 to 6.0% Mg are not particularly defined, but Fe that is often contained in a normal aluminum alloy is about 0.5% or less. , Si is about 1.5% or less, Mn is about 1.5% or less, Cr is about 0.2% or less, Zn is about 0.2% or less, Ti is about 0.2% or less, and other impurities are 0%. .15% or less is allowed.

  Further, as the titanium plate, it is preferable from the viewpoint of bondability and formability that the difference in strength from the aluminum alloy plate used in combination is small, and so the softest so-called pure titanium-based material among titanium materials, or Pd It is desirable to use a titanium alloy to which a small amount (usually about 0.5% or less) is added.

  Furthermore, the overall process, preferred conditions and the reason for implementing the method of the present invention will be described.

  In carrying out the method of the present invention, an aluminum alloy plate and a titanium plate whose surface roughness Ra is adjusted in advance as described above are prepared, and a titanium plate is arranged on one or both sides of the aluminum alloy plate to form a laminate. . FIG. 1 shows an example of a laminated body 3 in which titanium plates 2A and 2B are arranged and laminated on both surfaces of an aluminum alloy plate 1. Here, as described above, the surface roughness of each of the plates 1, 2 </ b> A, and 2 </ b> B may be adjusted so that at least the surface in contact with the other plate is adjusted within the aforementioned range. Also, whether the titanium plate is disposed only on one side of the aluminum alloy plate or the titanium plate is disposed on both sides depends on the groove shape imparting mode, for example, when the groove shape is imparted only on one side of the laminate. A titanium plate may be disposed only on the side of the surface, and when a groove shape is provided on both sides of the laminate, the titanium plate may be disposed on both sides.

  Here, the thickness of the titanium plate is preferably 0.1 mm or more, and the thickness ratio with the aluminum alloy plate is preferably in the range of 3 to 20% per side. If the titanium plate is too thin or if the thickness ratio with the aluminum alloy plate is too small, the effect of disposing the titanium plate as a corrosion-resistant layer is small, and the thickness ratio with the aluminum alloy plate exceeds 20%. Even if a titanium plate is provided, the effect as a corrosion-resistant layer is saturated and only the cost rises.

  On the other hand, the thickness of the aluminum alloy plate may be determined according to the final use of the aluminum alloy-titanium composite plate. For example, in the case of a fuel cell separator, the thickness of the composite plate after joining / grooving is 0.5. Since about 10 mm is necessary, the thickness of the original aluminum alloy plate may be set to about 0.8 to 50 mm in consideration of the compression rate (plate thickness reduction rate) during compression molding.

  As described above, an aluminum alloy plate and a titanium plate are laminated as described above, set between molds having protrusions corresponding to the groove shape, preheated as necessary, and 250 to 450 as described above. Warm compression molding is performed at a temperature within the range of ° C. As an example, FIG. 2 shows a state in which titanium plates 2A and 2B are arranged on both surfaces of an aluminum alloy plate 1 and are arranged between upper and lower molds 5A and 5B having protrusions 4A and 4B on the surfaces, respectively.

  In compression molding, it is preferable to compress so that the plate thickness reduction rate (the reduction rate of the thickness of the entire laminate) at the portion where the thickness is the smallest is within the range of 40 to 80%. If the plate thickness reduction rate is less than 40%, the deformation amount of the aluminum alloy and titanium is insufficient, and it may not be possible to form the groove shape to be obtained, or the bonding may be insufficient and peeling may occur. On the other hand, if the plate thickness reduction rate exceeds 80%, the deformation of titanium does not catch up with the deformation of the aluminum alloy, and molding defects such as cracking of the whole material and peeling of titanium on the surface occur.

  An example of the aluminum alloy-titanium composite plate 6 obtained by compression molding as described above is shown in FIG. The composite plate 6 is in a state in which grooves 7A and 7B corresponding to the protrusions 4A and 4B of the molds 5A and 5B are formed on both surfaces, that is, the side where the titanium plates 2A and 2B are arranged.

  As described above, the groove shape can be imparted simultaneously with the joining of the aluminum alloy plate and the titanium plate with good joining property and formability (groove shape imparting property).

  In the example of FIGS. 1 to 3, a titanium plate is provided on both sides of an aluminum alloy plate to provide a groove shape on both sides, which is preferably used for a separator for a fuel cell (except for an end plate). be able to. On the other hand, when a titanium plate is provided only on one side of the aluminum alloy plate and a groove shape is provided only on one side (only the side on which the titanium plate is provided), it is suitable for an end plate among fuel cell separators. In addition, a groove shape may be appropriately provided on one side or both sides according to the final application such as various building exterior materials and heat exchanger flow path components.

  A pair of upper and lower molds 8 (upper mold and lower mold) having a 200 mm × 200 mm ridge shape embedded with a heater 9 as shown in FIG. 4, or a mold having a similar ridge shape (upper Mold) and a flat mold (lower mold) having no protrusions were prepared, and these were assembled in a 4-post type 50-ton hydraulic press. On the other hand, the alloy no. Aluminum alloy plates (thickness 8 to 16 mm) made of aluminum alloys having various Mg amounts shown in A1 to A10, and alloy Nos. Pure titanium or alloy No. corresponding to JIS type 2 shown in T1 A titanium plate (thickness of 1 to 2 mm) made of a titanium alloy added with a small amount of Pd shown in 2 is combined as shown in Tables 3 and 4, and the titanium plate is arranged on both sides or one side of the aluminum alloy plate, Set the titanium plate between the upper and lower molds so that it touches the ridges of the mold, lightly sandwich it between the upper mold and the lower mold, preheat for 5 minutes, and then compress and join / mold Was done. In addition, as an aluminum alloy plate and a titanium plate, those having surface roughness Ra adjusted in advance as shown in Tables 3 and 4 respectively were used. In Tables 3 and 4, the example in which “both sides” is described in the “groove” section uses a titanium plate on both sides of an aluminum alloy plate and has protrusions as upper and lower molds. In the example of compression molding and “single side”, a titanium plate is disposed only on one side of an aluminum alloy plate, and compression molding is performed using a flat lower die and an upper die having a protrusion. An example is shown.

  For grooved composite plates obtained by compression molding at various temperatures and various thickness reduction ratios as shown in Table 3 and Table 4, the groove portions are correctly formed following the shape of the protrusions of the mold. It was evaluated whether or not it was possible and whether a sound product plate was obtained. In other words, if the groove could not be formed along the shape of the protrusion of the mold, and if the surface was swollen due to peeling of the titanium, and if the titanium was torn or cracked, both were rejected, The cases other than that were regarded as acceptable, and “Evaluation” in Tables 3 and 4 were marked with “X” and “O”, respectively.

  Each of Examples 1 to 10 shown in Table 3 applies conditions within the range defined by the present invention. In these examples, the groove shape can be reliably imparted to the surface at the same time. It was found that there was no peeling, cracking or tearing of the titanium, and that both the bondability and formability were good.

  On the other hand, Comparative Examples 1 to 13 shown in Table 4 are those in which any of the conditions deviates from the range specified in the present invention. In these Comparative Examples, appearance defects such as peeling, cracking, and tearing occurred. It became a defective product as a product plate.

  Furthermore, when these Comparative Examples 1-13 are demonstrated in detail, since the temperature at the time of compression molding was too high in Comparative Examples 1 and 2, peeling occurred. Of these, Comparative Example 1 was slightly lower in temperature, but the surface of the titanium plate was too smooth to join. Based on the results of Comparative Examples 1 and 2, Comparative Examples 3 to 5 are examples in which the surface roughness of the titanium plate is further increased. However, in these cases, the titanium plate could not catch up with the formation of the aluminum alloy plate, cracking occurred (Comparative Example 3), or tearing off (Comparative Examples 4 and 5), both of which were defective. .

  On the other hand, by reducing the surface roughness of the titanium plate, good conditions were found as in the example. However, in Comparative Example 6, the surface of the aluminum alloy plate was too smooth, so that the joining was not possible and peeling occurred. It was. In Comparative Example 7, since the compression molding temperature was too low, molding could not be performed and peeling occurred. Further, in Comparative Example 8, although the surface roughness of the aluminum alloy plate was increased, it was not possible to join and peeling occurred due to the excessively high roughness and the low molding temperature.

  Comparative Examples 9 to 11 are examples in which the amount of Mg in the aluminum alloy was variously changed. In Comparative Examples 9 and 10, the amount of Mg was too small, and cracking and peeling occurred. On the other hand, Comparative Example 11 is an example using an aluminum alloy to which Mg was added in a large amount of 6.02%, and although formability was good, minute peeling (peeling) was found in appearance inspection. The comparative example 11 was not easy to manufacture because a large amount of Mg was added, and was unsuitable as a mass-produced product so that peeling could be found by appearance inspection.

  Further, Comparative Example 13 is an example using an aluminum alloy plate having a low high-temperature strength. In this case, titanium peeled off, and molding was not completed smoothly.

It is a typical perspective view which shows an example of the laminated body used with the method of this invention. It is a typical perspective view which shows the state which carries out the compression molding according to the method of this invention using the laminated body shown by FIG. It is a typical perspective view which shows the composite board obtained by the method shown in FIG. It is a perspective view which shows the metal mold | die used in the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aluminum alloy plate 2A, 2B Titanium plate 3 Laminate 4A, 4B Projection part 5A, 5B, 8 Mold 6 Composite plate

Claims (3)

  1.   A titanium plate is disposed on one or both sides of the aluminum alloy plate to form a laminate, and the surface of the aluminum alloy plate on the side in contact with the titanium plate has a surface roughness Ra in the range of 0.1 to 4.0 μm. The surface on the side in contact with the aluminum alloy plate in the titanium plate is adjusted in advance so that the surface roughness Ra is within the range of 0.1 to 6.0 μm, The laminated body is compression-molded at a temperature in the range of 250 to 450 ° C. by a mold having protrusions corresponding to the groove shape to be formed, thereby joining the aluminum alloy plate and the titanium plate and the groove shape. A method for producing an aluminum alloy-titanium grooved composite plate, characterized in that the application is performed simultaneously.
  2. In the manufacturing method of the aluminum alloy-titanium grooved composite plate according to claim 1,
    A method for producing an aluminum alloy-titanium grooved composite plate, wherein the aluminum alloy plate has a high-temperature tensile strength at 350 ° C. of 30 MPa or more and a high-temperature yield stress of 20 MPa or more.
  3. In the manufacturing method of the aluminum alloy-titanium grooved composite plate according to claim 1,
    A method for producing an aluminum alloy-titanium grooved composite plate comprising using an aluminum alloy containing Mg 0.6 to 6.0% (mass%, hereinafter the same) as the aluminum alloy plate.
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